http://en.wikipedia.org/wiki/Petrochemical




Petrochemicals are chemical products derived from petroleum. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as corn or sugar cane.
This artile focuses on organic compounds that are not burned as fuel (see also Petroleum product).
petro cemicals come from a plant
Petrochemical Plant in The Kingdom of Saudi Arabia
Petrochemical Plant in The Kingdom of Saudi Arabia

Fractional distillation is the separation of a mixture into its component parts, or fractions, such as in separating chemical compounds by their boiling point by heating them to a temperature at which one or more fractions of the compound will vaporize. It is a special type of distillation. Generally the component parts boil at less than 25 °C from each other under a pressure of one atmosphere (atm). If the difference in boiling points is greater than 25 °C, a simple distillation is used.